diff --git a/examples/sample.source.PKIX1/Makefile b/examples/sample.source.PKIX1/Makefile
index 8125af7c..f123183e 100644
--- a/examples/sample.source.PKIX1/Makefile
+++ b/examples/sample.source.PKIX1/Makefile
@@ -337,7 +337,7 @@ TARGET = x509dump
 CFLAGS += -I. -DHAVE_CONFIG_H
 OBJS=${ASN_MODULE_SOURCES:.c=.o} $(TARGET).o
 
-all: $(TARGET)
+all: Certificate.c $(TARGET)
 
 $(TARGET): ${OBJS}
 	$(CC) $(CFLAGS) -o $(TARGET) ${OBJS} $(LDFLAGS) $(LIBS)